I can't find the config files for the plugins i downloaded, I'm looking in the Files & Plugins tab and can't find where to edit it. I tried to click the names of them, but it just highlights them. the only other things I found to click is the Install plugins, and the delete plugin (the trash can) button. There's also a plugins/ thing at the top, but it doesn't seem to do anything. 
EDIT: I found it, apparently you have to start your world before before the configs show up
